Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (03): 486.doi: 10.3969/j.issn.0251-0790.2012.03.010

• Analytical Chemistry • Previous Articles     Next Articles

Quantitative Analysis of hOGG1 Activity Based on Molecular Beacon

LIU Bin, YANG Xiao-Hai, WANG Ke-Min, TAN Wei-Hong   

  1. State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China
  • Received:2011-03-14 Online:2012-03-10 Published:2012-03-10

Abstract:

Human 8-oxo-guanine DNA glycosylase 1(hOGG1), which mainly catalyzes the excision of 8-oxoG and cleaves the AP site from DNA to sustain the genome integrity, plays an important role in many biological events including tumor development. However, available methods of hOGG1 assay based on gel electrophoresis are complicate, laborious and discontinuous. Here, we report a new method to analyze hOGG1 activity using molecular beacon containing 8-oxoG coupled with enzyme-linkage reactions, the detection limitation of this method is 0.0125 U/mL. Furthermore, the method was applied for quantification of hOGG1 activity in tumor cells and investigating the effect of metal ions on the reaction. The results demonstrate that the easy, simple and non-radioactive method has the potential to screen suitable inhibitors for hOGG1 and can be applied for high-throughput analysis of hOGG1 activity in tumor samples.

Key words: Molecular beacon, Human 8-oxo-guanine DNA glycosylase1(hOGG1), Real-time monitoring

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